Americans own almost half of all civilian firearms in the world, with an estimated 90 firearms for every 100 people in the United States, USA Today reports.

Based on a study by Geneva-based research group the Small Arms Survey found that America far outstretches the rest of the world in gun ownership. Yemen, the country with the next-highest rate of guns to people, has 55 firearms for every 100 people.

David Hemenway, director of the Harvard Injury Control Research Center, found that firearms-related homicides in this country are 25 times higher than European countries with similarly high income, such as France, Austria and Finland. Hemenway also found that, on average, 300 Americans are shot and 100 die from gunshots every day. In the entire European Union, which has more than twice the population of the United States, 18 people on average die from gunshot wounds each die, three-quarters of which are suicides.

Adam Lankford, criminal justice professor at the University of Alabama, studies mass shootings in 171 countries from 1966 to 2012, and found that a third happened in the United States. There have been 273 mass shootings in 2017. In 2016, 383 mass shootings took place in America, up from 333 in 2015, according to the Gun Violence Archive.